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1260-12 User Manual
2 Addendum Page 6/98
Control Information for the 1260-12
The following information describes the control-register-to-relay-channel mapping for a 1260-12
Relay Module. This information may be used to control a 1260-12 when using a 1260-01T in the
register-based mode of operation.
Each relay on this module is controlled by setting or clearing a single bit within a Control Register.
Control Registers on the module operate 8 channels simultaneously. There are eight control bits
per Control Register. Setting the bit to a 1 closes the relay; setting the bit to a 0 opens the relay.
The table below shows the mapping from logical channels to control bits. The logical channels
are used when operating the relay module in message-based mode. The control bits within the
Control Registers are used to operate the module in register-based mode.
Each Control Register is located 2 addresses from the previous Control Register. That is, each
Control Register is located at an odd address. This is shown in Table 2-2 of the 1260-01T
manual. Control Register 0 is located at the “Base A24 Address” for the module. Consult the
“Register-Based Operation” Section of Chapter 2 of the 1260-01T manual for a description of
calculating control register addresses.
Channel Control Register Control Bit
0 0 0
1 0 1
2 0 2
3 0 3
4 0 4
5 0 5
6 0 6
7 0 7
8 1 0
9 1 1
10 1 2
11 1 3
12 1 4
13 1 5
14 1 6
15 1 7
16 2 0
17 2 1
18 2 2
19 2 3